Only Applicable Printer Model: ? for HP Smart-Tank 7301 7602 7001 6001 5101 Printer ? for HP Smart Tank Plus 651 551 Printer ? for HP Smart Tank Plus 450 455 457 Printer ? for HP Smart Tank Plus 502 514 517 532 555 557 559 570 571 Printer ? for HP Smart Tank Plus 617 655 Printer, ? for HP DeskJet GT-5810 GT-5820 GT-5822 Printer ? for HP Ink Tank 310 319 410 415 416 418 419 Printer How to refill? 1--- Please find the ink bottle to replenish ink first, the color of the top cover of the ink bottle is consistent with that of the ink. 2---Please directly open the bottle cap and inject ink without squeezing the bottle by hand. It stops automatically when the ink is full. Features: ? Premium Raw Material: Importted paste and no damage for the print head. No Bleeding, No Smearing, High Print quality. ? Nano Particle: 100% compatible, ink contained with anti head blocking and 0.1 micron filtration, benefit to extend the life of print head. ? Excellent fluency: with adjusted of ink viscosity and surface tension for further enhance the printing fluency. ? Outstanding ink stability: high color saturation, high fidelity, fast drying, good permeability, strong adhesive force.